Saw filing and setting machine



2 sheets-sheet 1.

N E S N E m S I R H C B a d 0 M 0 W SAW FILING AND SETTING MACHINE.

Patented Apr. 5, 1892.7

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(No Model.)

.2 Sheets-Sheet 2- ELOHRISTENS EN. SAW FILING AND SETTING MACHINE.

Patented Apr. 5 1892.

6 6.6. Ina/ W may erative lever of the saw-clamping jaws.

NITED STATES PATENT OFFICE.

EMIL CHRISTENSEN, OF PORTLAND, OREGON.

SAW FILING AND SETTING MACHINE.-

SPECIFIOATION forming part of Letters Patent No. 472,031, dated April 5, 1892. I Application filed January 15, 1892. Serial No. {118,174. (No model.)

To aZZ whom it may concern.-

Be it known that I, EMIL CHRISTENSEN, a citizen of the United States, residing at Portland, in the county of Multnomah, State of Oregon, have invented certain new and useful Improvements in a Combined Saw Filing and Setting Machine, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to that class of sawsharpening machines in which the file is suitably reciprocated against the saw-teeth; and the objects of my improvement are to provide simple means for reciprocating the file and also for operating the saw-setting mechanism and adjust them to file and set the teeth of a band-saw without displacing it from the wheels by which it is carried. I attain these objects by the construction illustrated in the accompanying drawings, in which Figure 1 is a side view of a combined sawsharpening and saw-setting machine constructed in accordance with my invention. Fig. 2 is a top View of the same. Fig. 3 is an end view of the same. Fig. 4 is a side View of the operating-lever to rock the file. Fig. 5 is a perspective of the saw-feeding lever. Fig. 6 represents on a larger scale a side view of the saw-setting mechanism. Fig. 7 isatop view of the same with its cap-plate removed. Fig. 8 is a top view of the cap-plate removed from Fig. 7. Fig. 9 is a top view of the op- Fig. 10 is a perspective view of the pivoted finger forming part of the saw-setting carriage. Fig. 11 is a vertical section of one of the tile clamps.

In said drawings, A represents the baseplate of the machine, having projecting upward therefrom the bearings A that receive the driving-shaft B, through which motion is given to all the movableparts of the machine, said shaft having at one end a hand-crank B. The shaft can also be operated by means of abelt or band in connection with a grooved pulley mounted thereon. Upon one end of said shaft is mounted one end of a cam B that has one of its faces preferably recessed and is rotated in the direction of the arrow thereon. This cam is united to a horizontallysliding shaft 0 by means of a connectingrod 0, having one end carrying a bolt adjustably retained in a radial slot in the cam and the other end loosely attached to the shaft 0 by means of a screw 0 entering the side of said shaft after passing loosely through a bearing-hole in one end of said rod, a small amount of loose fitting being necessary to permit the shaft 0 to be partly rotated or oscillated in its bearings A while it is reciprocated through them. The bearings A project vertically from the top of base-plate A, but at a suitable distance apart to permit the shaft 0 to carry between them the clamps c I 0 by which the file d is retained connected to said shaft 0. Each file-clamp is provided with a screw 0 on top thereof, the point of which enters a groove 0 made lengthwise of the shaft 0 to control the rocking of said shaft and of the file. The clamp 0 is provided with a laterally-extended arm or lever 0 that is normally kept in a horizontal position by a weight 0 placed adj ustably thereon, said weight carrying a screw on one side, by which it is screwed to the lever C To prevent the outer end of saidlever from being depressed below asubstantially horizontal position, said end rests upon a guard D, projecting from the top of the base-plate A. The top of said guard is horizontal, and upon it the outer end of said lever (l is adapted to travel; but as said outer end is provided with an adjusting-screw c the flat point of said screw will travel upon the guard D if it projects beyond the bottom surface of the lever 0 To steady the movements of the lever O and prevent it from being jerked up too high by the momentum of the operating-lever E when w the machine is operated by a high speed, a spring f is used which has tendency to depress the lever 0 For this purpose one end of said spring is coiled around and secured to the support F of the lever E, and the opposite end is mad to pass through an eye f pendent from the under side of the lever 0 The operatingleverE is pivoted ate in the upper end of the support F, and the latter projects up from'the top of the base-plate A. One end of said lever is made to bear against the periphery of the cam B and is operated by the latter. The opposite end of the lever E bears against thev under side of the lever C to elevate the latter and partially rotate the shaft 0, andconsequently takethe file away from the saw during the rearward stroke of said file. At the same time the saw S is elevated one tooth by a pawl pivoted to the lever G, that has one end in engagement with a hook E formed on the under side of the lever E. The lever G carries a small spring g to keep the pawl g in engagement with the teeth of the saw. Said lever is mounted upon a fulcrum pin or bolt G that is secured to a standard A projecting up from the base-plate A and beyond one of its sides. The lever G has in its outer end a series of holes g to receive in either one of them the fulcrum-bolt 9 adapted to be received in one of the corresponding holes in the standard A to give more or less vertical oscillation to the lever carrying the sawfeeding pawl g. The saw is guided and maintained against one side of the standard A by a retaining-plate A', which is provided with a feather entering a groove a in the side of the said standard, vertical grooves of dilferent depths in each end to receive different-sized saws, and a bolt or bolts secured to the standard and passing through slots a in the plate A so that said plate can be reversed for different-sized saws.

When the parts are in the position shown in Figs. 1, 2, and 3, the lever C, having the shaft 0 for fulcrum, is lowered upon its guide I) and the saw-tooth receives one stroke from the file, the adjustable weight G on said lever giving the desired pressure of the file against the saw. Said file is retained at each end. by latches a Fig. 11. Each latch, being pivoted in a groove of the clamp, has a screw a hearing against its lower half to force its upper half against the file and firmly clamp the -latter.

To do the setting of the saw-teeth,tl1e connecting-rod II of the saw-set is subjected to four motions, two of which for each revolution of the cam B to set one of the teeth to one side and the succeeding tooth to the opposite side. For this purpose one end of connecting-rod is secured to a horizontally-sliding carriage operated by said cam. Said carriage consists of two horizontal rods K, made to pass through a standard A, projecting from the base-plate, and through eyes or bearings (not shown) projecting from the side of the main-shaft bearing A A single rod K may be used for the same purpose by providing it with a groove to receive a feather that would prevent it from rotating. The rods K are one above the other at suitable distance apart, and are connected together near one end by a clamp L and at the other end by a clamp M, having on top thereof a funnelshaped guide M open on one side. This clamp has also at its lower end a foot M to which one end of the connecting-rod H is pivoted at m.

The cam B has projecting from its side a' roller 19 that imparts the four motions to the carriage and to the connecting-rod H as follows: The rods K and their clamps L and M are shown in the drawings to the extreme left of their course. The cam B being made to rotate in the direction of the arrow thereon, the roller 11 moves down the funnel-shaped guide M and causes the rods K, attached thereto, to move a certain distance to the right side. The roller continues to advance, passes on the outside, and presses against said outside of a wedge-shaped, but curved,finger L pivoted at Z to the under side of the clamp L, near the top thereof. This finger is retained by its pivot with suflicient friction against the clamp L to remain temporarily at any angle that it maybe pushed by the roller 12 The amount of tilting or inclination that the finger L can have is small, as it is limited byapin Z projecting from its side and abutting against the ends of a small horizontal slot in the side of the clamp L, in which said pin is received. As above stated, the roller 11 presses against the outside of the finger L and moves the rods K, with their clamps L M, to the extreme right of their course. \Vhen the roller 12 has passed the fulcrumpin Z, it presses against the wide portion of the finger L and thus tilts the point of the fingerdown or toward the periphery of the cam B The roller b continuing to advance, again enters the funnel-shaped guide M and moves it and the rods K halfway to the left. .The roller b continuing to advance, bears against the inside of the finger L and causes the rods K to move to the extreme left. The roller b passing the fulcrum of the finger L again throws the point of the finger to the position shdwn in Figs. 1 and 2.

The saw-set consists of a narrow steel plate P, that is secured at one end to the base-plate A of the machine by means of a bolt or screw 19, and at the other end is retained adjustably depressed by means of a thumb-screw 3 the point of which enters a lug a on the side of the base-plate A. The plate P, being of caststeel, has the desired resilience to be adjusted up or down in relation to the saws, some of which have three teeth and others have five teeth to the inch, the adjustment being made relative to the pawl g. To the plate P and its cap-plate P are pivoted at p the jaws Q, used to clamp the saw while its teeth are bent or set to either side. Said jaws are made to clamp the saw by spreading their long straight ends by means of a lever R, pivoted between them at r to the plate P and its cap-plate. Said lever has an eccentric-head having two of its edges flattened to relieve the jaws of pressure when the lever is on a line with the axis of the jaws; but when turned to either side, as shown in Fig. 7, the saw is clamped properly to have its teeth set. The outer end of the leverRis connected by means of alink R with the set-lever T, that has its inner end pivoted at t to the plate P and its cap-plate P The set lever has its outer end provided with the holes t to receive in either one of them a bolt or pin t projecting from the under side of the reciprocating connecting-rod 11. When said rod is connected with the inner hole, as shown in the drawings, more throw is given to the lever, and consequently more set to the saw. The four motions imparted to the saw-set by the roller 19 on the cam 13*, in connection with the funnel-guide M and the pivoted finger L will set one tooth to one side and then return to thecentral position to allow one tooth of the saw to pass. Then it will set one tooth on the opposite side and return to the center again, &c.

To connect the machine to the band-saw table, two bolts or dowels can be used and inserted in the holes V, formed in the ends of the base-plate and made to enter corresponding holes in the saw-table. The machine can also be set in any suitable location and be operated by a belt passing around the pulley U on the main shaft.

Having now fully described my invention, I claim- 1. In a saw-filing machine, the combination of a cam and its shaft, a reciprocating shaft 0 and connecting-rod uniting it to the cam, file-clamps adj ustably secured to the shaft 0,

'one of said clamps being a lever 0 a weight adj ustably secured upon said lever, and means for lifting the lever 0 and a guide D, substantially as described.

2. The combination of a cam and its shaft, a reciprocating. shaft 0 and connecting-rod uniting it to the cam, file-clamps adj ustably secured to the shaft 0, one of said clamps being a lever 0 and a pivotedlever E, having one end in contact with the cam and theopposite in contact with the under side of th lever 0 substantially as described.

3. The combination of a cam and its shaft, a reciprocating shaft 0 and connecting-rod uniting it to the cam, file-clamps adjustably secured to the shaft 0-, one of said clamps having a lever 0 a pivoted lever E, having one end in contact with the under side of the le- 'ver 0 and a spring), having one end in engagement with said lever 0 substantially as described.

grooved and having a pivoted latch in the groove and a screw bearing against its lower half, substantially as described.

6. The combination of a cam and its shaft and a roller b on said cam with a horizontallyreciprocating carriage having a funnel M clamped thereon at one end, a clamp L at the opposite end, and a finger L pivoted to the clamp L, substantially as described.

7. The combination of a cam and its shaft and a roller b on said cam, a reciprocating carriage having a funnel M at one end, a clamp L at the opposite end, and a finger L pivoted to the clamp L, with aconnecting-rod H, a plate P, adj ustably secured to its support,-

a pair of jaws pivoted to the plate P, a pivoted lever B to close saidjawsand a saw-set lever Tpivoted between said jaws, and a link uniting the levers R and T,'substantially as de- 8. In combination with a saw-filingmachine,

scribed.

a circularly-travelin g roller b mounted thereon, and a reciprocating carriage having afu n-- nel-shaped guide at one'end and a pivoted finger at the otherend operated by said roller,

whereby four distinct reciprocating motions are given to said carriage, substantially as described. In testimony whereof I affix my signature in presence of two witnesses.

EMIL CHRISTENSEN WVitnessesr CHAS. A. MARLITT, H. L. REES. 

